This paper presents field geological and petrographic aspects of various granitoid units occurring around Khatgaon area in the southeastern part of district of Maharashtra. The study area is bestowed with granitoids of Archaean to Proterozoic age overlain by Deccan basalts of Cretaceous age. Three main types of granitoids were identified in the study area viz., older granites, gneissic/foliated younger granites. These granitoid rocks are traversed by dykes, veins and veinlets of felsic and mafic composition. Although these granitoids are similar in mineralogy, they exhibit differences in petrographic characteristics. The granitoids of the study area, especially the gneissic granitoids, comprise felsic and mafic lenticular enclaves of different sizes. Petrographically older and younger granitoids show medium to fine-grained, porphyritic and inequigranular textures. The gneissic rocks foliation. At the contact of mafic enclaves and gneissic zones, conspicuous variation in mineralogy is observed in thin-sections. Presence of enclaves indicates coexistence and mixing of both felsic and mafic magmas at the source. The typical textures perthitic, graphics and lamellar twinning indicate a direct magmatic origin for these granitoid rocks. The presence of pyrite mineralization at Khatgaon indicates late stage hydrothermal activity associated with felsic veins.

Field geological and petrographic characteristics of granitic rocks and their variants exposed at Devadurga town, Raichur district, Karnataka are described. The granitic rocks of Devadurga are part of younger 'Closepet granite' within a country of Peninsular Gneissic Complex (PGC) of Archaean age. Based on field and petrographic observations of this investigation, the younger granitic rocks of 'Closepet granite' within the study area can be subdivided into leucogranite, grey porphyritic granite, pink granite, pink biotite granite, grey biotite granite, pink porphyritic granite. All these granitic variants possess more or less similar mineralogical assemblages and petrographic features such as myrmekitic, perthitic signifying their magmatic origin.